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X1.8 solar flare on 2025-01-04
ClassX1.8GOES-16 science data
Peak12:482025-01-04 UTC
Duration20 min
Peak flux1.8e-04W/m²
| Comparison | Value |
|---|---|
| Rank among X flares (since Jun 2017) | 44 / 108 |
| Rank in year | 6 / 3004 |
| Other M/X flares that day | 3 |
| M/X flares that month | 43 |
| Solar cycle | Cycle 25 |
Compared with the strongest flares of 2025
X5.1
X4.0
X2.4
X1.9
X1.9
X1.8
X1.8
X1.7
X1.7
X1.2
X1.2
X1.2
Other M/X flares that day
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 00:34 | 00:36 | 6 | M1.5 | – | – | |
| 04:58 | 05:18 | 28 | M7.7 | – | – | |
| 23:08 | 23:26 | 27 | M2.1 | – | – |
All times UTC. Until June 2017 classes are NOAA's reports of the time (GOES-15 and earlier included a 0.7 scaling factor); later classes come from calibrated GOES-16/18 data, so the same flare reads about 1.4× larger. Do not compare the two periods directly.
← M7.7 2025-01-04M7.4 2025-01-17 →
About this page
A X1.8 flare that began 2025-01-04 12:35 UTC; No. 6 of 3,004 C-class-or-larger flares in 2025.